If the program was working perfectly with the previous patch it had, it was better for you to just leave it the way it was. But if the program is starting to freeze up maybe something may be wrong with the program or your computer. It is better for you to remove the program and re-install it again to see if it works much better. See if you don't have the background rendering when editing your movie. You can turn it back on when you finish editing it. Use patch 11.1.1 ( I have it installed and seems to work perfect).
Check to see if you don't have a corrupted file or music. Try making your project into AVI and then you can make it into a DVD (using safe mode) or Tape.